USB: serial: mos7720: fix use-after-free on probe errors
commit
91a1ff4d53c5184d383d0baeeaeab6f9736f2ff3 upstream.
The interrupt URB was submitted on probe but never stopped on probe
errors. This can lead to use-after-free issues in the completion
handler when accessing the freed usb-serial struct:
Unable to handle kernel paging request at virtual address
6b6b6be7
...
[<
bf052e70>] (mos7715_interrupt_callback [mos7720]) from [<
c052a894>] (__usb_hcd_giveback_urb+0x80/0x140)
[<
c052a894>] (__usb_hcd_giveback_urb) from [<
c052a9a4>] (usb_hcd_giveback_urb+0x50/0x138)
[<
c052a9a4>] (usb_hcd_giveback_urb) from [<
c0550684>] (musb_giveback+0xc8/0x1cc)
Fixes:
b69578df7e98 ("USB: usbserial: mos7720: add support for parallel port on moschip 7715")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>